SPSS® 12.0 Command Syntax Reference

1196 PARTIAL CORR
MATRIX Subcommand
MATRIX reads and writes matrix data files.
• Either IN or OUT and a matrix file in parentheses is required. When both IN and OUT are
used on the same PARTIAL CORR procedure, they can be specified on separate MATRIX
subcommands or both on the same subcommand.
OUT (filename) Write the (highest-order) correlation matrix to a file. Specify either a filename
or an asterisk, enclosed in parentheses. If you specify a filename, the
file is stored on disk and can be retrieved at any time. If you specify an
asterisk (*), the matrix data file replaces the working data file but is not
stored on disk unless you use SAVE or XSAVE.
IN (filename) Read a matrix data file. If the matrix data file is the working data file, specify
an asterisk (*) in parentheses. If the matrix data file is another file, specify a
filename in parentheses. Both the working data file and the matrix data file
must contain all the variables specified on the VARIABLES subcommands on
PARTIAL CORR. A matrix file read from an external file does not replace the
working data file.
Matrix Output
• The matrix materials that PARTIAL CORR writes can be used by subsequent PARTIAL
CORR procedures or by other procedures that read correlation-type matrices.
• In addition to the partial correlation coefficients, the matrix materials PARTIAL CORR
writes include the mean, standard deviation, and number of cases used to compute each
coefficient (see “Format of the Matrix Data File” on p. 1197 for a description of the file).
If PARTIAL CORR reads matrix data and then writes matrix materials based on those data,
the matrix data file that it writes will not include means and standard deviations.
• PARTIAL CORR writes a full square matrix for the analysis specified on the first VARIABLES
subcommand (or the first analysis list if keyword VARIABLES is omitted). No matrix is
written for subsequent variable lists.
• Any documents contained in the working data file are not transferred to the matrix file.
Matrix Input
• When matrix materials are read from a file other than the working data file, both the
working data file and the matrix data file specified on IN must contain all the variables
specified on the VARIABLES subcommands.
• MATRIX=IN cannot be specified unless a working data file has already been defined. To
read an existing matrix data file at the beginning of a session, use GET to retrieve the
matrix file and then specify IN(*) on MATRIX.
• PARTIAL CORR can read correlation-type matrices written by other procedures.
• The program reads variable names, variable and value labels, and print and write formats
from the dictionary of the matrix data file.